Cofabrication of Electromagnets and Microfluidic Systems in Poly(dimethylsiloxane)

Metal in microfluidic channels: The fabrication of electromagnets (solder) with micron-scale dimensions in poly(dimethylsiloxane) in close proximity (ca. 10-μm separation) to microfluidic channels is described (see pictures, top view and cross section). The method only has four steps and can be completed in 10 min. By passing an electric current through the magnets, magnetic field gradients are generated inside the microfluidic channels, which can be used to capture and release superparamagnetic beads in the microfluidic channel. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2006/z602273_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.